Pneumatic type-writer.



M. SO'BLIKQ PNEUMATIC TYPE WRITER. APPLICATION FILED DBO. 1913.

Patented May 12, 1914.

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@ QQ QQQ UNITED g MAX SOBLIK, OF'DBESDEN-KLOTZSCHE, GERMANY.

' PNEUMATIC TYPE-WRITER.

T 0 all who-m it may concern: I Be it known that I, MAX SQBLIK, engineer, a subject of the German Emperor, and re-. siding'at 2 Gartenstrasse, Dresden-Klotzsche, Kingdom of Saxony, Germany, have invented certain new and useful Improvements in Pneumatic T ype-lvriters, of which the following is a specification.

The present invention relates to typewriters, described in the United States Patent 1075512 of application No.- 749082 and has for its object improvements in the action of these machines employing a rotating type wheel whereby the regular operation and light working of the keys is insured.

According to the present invention, the keys are in communication with flexible spirals, which are prevented from deflection by rigid inclosing tubes, and which transmit the motion imparted to them by the keys to feed or type pawls through the intermediary of strengthened ends. Further, the spirals with their reinforced ends are not rigidly connected to the keys and the machine parts to be operated, but are merely adapted to transmit the thrust received by them to said machine parts, so that the heads of the keys may be arranged at 'or shifted to any suitable points of the keyboard.

l none convenient form of the invention a group of locking bars is arranged in the arc of a circle, and is secured by pawls which are displaced by the action of the keys so as to form a stop for a. rotating member'which determines the character upon the type wheel.

The invention also consists in the arrangement and operation of parts hereinafter more particularly described. f

One convenient mode of carrying the in vention into effect is illustrated by way of example in the accompanying drawings, in which Figure 1 is a vertical section, Fig. 2 a horizontal section A-B, and Fig. 3 represents, on an enlarged scale, the design and construction of the impulse transmitting mechanism.

The lOClilllg bars (a) are normaily held depressed by a pawl (g) which is displaced by the operation of the keys After the removal of the pawl (g), the bars (a) under the action of the springs rise suddenly, independentlyof the speed of keys,

into the path of the rotating member ((5) and provide a stop for the same, thereby Specification of Letters Patent.

d,i termining the character upon the wheel (type wheel). The axle on which the three rotating members 01) are mounted, revolves the gear system i gearing equal'to three and by means of a shutting and two universal joints (to) re volves the type Wheel (2).. The keys (Z2) are arranged with stems on which are pivoted pawls (t). These pawls are turned b inclined noses (u), after having moved own the members (0), so that these return directly after being pressed, and leavethe impulse-transmitting means free. The look ing bars (a) are provided with lower arms (9'), which receive a downward blow after each'imprint of type by the diaphragm (s) and serve the purpose of reengaging the locking bars with the pawl (g), so that the arm ((5) can continue its rotation.

The impulse transmitting means is shown insection in Fig. 3. A line spiral is inclosed in a tube and" the ends pf the spiral are reinforced by tips or members (0) and (p) respectively engaging the key stemsand pawls Inasmuch as. the space where the striking members 7?) meet is very limited, the movable spirals in the stationary tubes (7') must have a very small di-- ameter (one millimeter circa) and this necessitates a spiral method for their intro duction. The tubes (f) have a diameter throughout slightl larger than the diameter of the spiras, so that the latter can move therein; the ends of the spirals are stiffened. In order to insert such spirals with stiffened ends {in the bent tubes (f) collars (1") are ,placelfhon the members (0),

and the ends of the tubes are provided with hollow nuts (m) and ('11 The members (0) (79) have pins which extend within the spiral for a short distance. The outer memher. (0) is first secured to the spiral before its insertion into th' tube; whereupon the spiral in inserted with its other end into the tube and passes therethrough as far as the hollow nut (71,.) The sto strikes againstthe hollow nut (it) and the inner member (7)) can be secured In this erra.

'0) that has a ratio of- Patented May i2, 191%. Application filed December 4, 1913. Serial No. 804,759.

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(i) then condition the hollow nut (m) can'be inserted into the catches (q), situated beneath each of the keys and then secured by the screw-cap (Z) and by the members (is) in the holes in the wall The wall (1) is connected with the key board (a which is fastened by screws on the casting of the machine in order to take off the keyboard with the mounted spirals and tubes.

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Having thus particuleily described end FSCGKt-Hfll'id the nature-f my" eaid invention and in what manner the same is-to be pen "formed, I declare that what I claim is 1. In 3, typewriter a. type wheel a type wheel locking membei', a key, a tnbe extending fx cm the key toward the type Wheel flicking fmembelybe flexible spiral spring within said tube, a reinforcing tip fitted to the 'outer end at the spring andedepted to be operativel'y engaged by the key, and

means fen operetiveiy connecting the inner end of the springit'o th'e type-wheel lockming member.

teeegme ing' tip fitted to the inner end of the sprin and adapted to operatively engage the pew and means for operatively connecting the outer end of the spring to the key.

3. In a, typewriter, a type wheel, a series of spring-controlled type wheel locking bars arranged in the arc of a circle, pawls adapted to engage said bars,v a type Wheel controllin member adapted to be engaged by the loc ing bars, a series of keys, :1 series of tubes extendingfromthe keys toward the; locking bars, and a. series of fiexiblespirnls within said tubes that are adapted to transmit the movement Qfthe keys to the pa'mls.

tux seeLn I .Vitnesses:

PAUL Alums, CLARE SIMON. 

